Numeral Raises $100m Series C for AI Sales Tax Compliance
Numeral, a San Francisco startup automating sales tax compliance with AI, has raised a $100 million Series C led by Insight Partners (read more here). The round brings its total funding to $157 million.
Sam Ross, co-founder and CEO of Numeral, announced the news on Wednesday. Previously, Numeral secured $35 million in Series B funding in September 2025.
What Numeral Does
Numeral offers software managing sales tax compliance from start to finish, including:
- Tracking tax obligations
- Registration and calculation of rates
- Filing, payment, and management of exemption certificates
They also support VAT and GST compliance in 90+ countries and integrate with over 40 billing, financial, and ERP systems. Numeral combines a deterministic tax engine with AI and automation, and customers can access in-house tax specialists for complex cases.
Rapid Growth and Expansion
Numeral's transaction volume grew 327% year-over-year, expecting to process over 80 million transactions through its tax engine. Customers report saving up to 80% on filing and registration time.
The company points to California as an example of the fast-changing landscape:
- The state has recently extended sales tax to prewritten software (including SaaS) from 2027.
Rebecca Liu-Doyle, a managing director at Insight Partners, highlighted the growing complexity:
"Sales tax is mission-critical to get right, and the complexity is only growing as regulations expand into new products and markets."
Competitors and Funding Trends
Other AI compliance startups have also secured funding recently:
- HelmGuard raised $7.3 million for AI compliance agents.
- Comp AI secured $34 million to automate security compliance.
- Benford received a pre-seed round to build a tech-native audit firm.
Numeral's Funding Use
Numeral plans to use the new funding for product development and expansion into software, manufacturing, distribution, and wholesale industries. They will also invest in engineering, sales, marketing, and product teams, and have launched an accounting partner program.